Why haven't they made this obvious game yet?

[Mnementh]

haxxiy said:
An open-world Hogwarts game, and a good dinosaur survival game come to mind.

Well, there was Robinson's Requiem, a really difficult to survive game on a planet with many beasts including Dinosaurs:

https://www.youtube.com/watch?v=bQ_hZBW6glk&list=PLc8_TGjGbIHjykJqWD_cCAFAhlxOuIGFf

https://www.gog.com/game/robinsons_requiem_collection

Apparently there is a newer game inspired by elements of that:

https://www.youtube.com/watch?v=SFXoLZ8Be1Y